As long as your devotion to green and red is less than seven, Xenagos isn't a creature.
At the beginning of combat on your turn, another target creature you control gains haste and gets +X/+X until end of turn, where X is that creature's power.
NM-Mint - $6.80
Lightly Played - $6.50
Moderately Played - $6.10
Heavily Played - $5.50
Damaged - $4.40
NM-Mint Non English - $6.80
Lightly Played Non English - $6.50
Moderately Played Non English - $6.10
Heavily Played Non English - $5.50
Damaged Non English - $4.40